38 SECOND REPORT ON ECONOMIC BIOLOGY. 



chamber in which to pupate and spend the winter. The entrance to 

 this chamber is oval, nearly always oblique and from 4.5 to 7 mm. 

 in length. The boring (Fig. 14) goes straight into the wood for a 

 little way, and then gradually curves round and runs parallel to the 

 grain of the wood. The length of the chamber is about 50 mm., and 

 a little broader at the end than at the entrance. 



PJG. 14. BORINGS OF LARVA ON SPRUCE PAWS. 



The larva (Fig. 10) is of a creamy white colour, except the head 

 and legs, which are brown, and the mandibles black. The body 

 segments arc well marked and covered with short golden yellow hairs, 

 which are numerous at the sides of the segments and almost absent in 

 the middle. Length of full-grow r n larva, 16 mm. 



